Method of manufacturing iron and steel sheets.



E B. T. BAEJFIELD.

METHOD OF MANUFACTURING mom AND STEEL SHEETS.

APPLICATION FILED SEP'1 .19,1913. 1 08 567 Patented'Aug. 25, 1914.

2 SHEETS-$111551? 1.

WITNESSES FTgVENTOF! M By 5' ,6 I

R. T. BANFIELD.

' METHOD OF MANUFACTURING IRON AND STEEL SHEETS,

Patented Aug. 25, 1914;

'APPLIGATIQN FILED SEPT. 19 1913.

2 SHEETS$HEET 2.

7? #5232 held; I Z7 ROBERT T. BANFIELD, OF PITTSBURGH, PENNSYLVANIA.

METHOD OF MANUFACTURING IRON AND STEEL SHEETS.

Specification of Letters Patent.

Patented Aug. 25, 1914.

Application filed September 19, 1913. Serial No. 790,760.

To all whom it may concern Be it known that I, Eonnn'r T. BANFIELD,

a citizen of the United States of America,

residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania,-have invented certain new and useful Improvements inMethods of Manufacturing Iron and Steel Sheets, of *f' -1ichuthefollowing is a specification, referen -e being had therein to theaccompanying drawing.

This invention relates to a method of manufacturing iron and steelsheets and has for its object to set up a method, in a manner' ashereinafter set forth, to obtain a greater tonnage per mill, with lesscost, than the methods now in general vogue.

A further object of the invention is .to provide, in a manner ashereinafter set forth, a method of manufacturing iron and steel sheets,free from scale and pitmarks, under such conditions reducing the costwhen pickling for galvanizing or stamping.

A further object of the invention is .to provide a method ofmanufacturing iron and steel sheets whereby the number of furnacesrequired during the method is less thanthe number of furnaces requiredin the methods now in general vogue, at the same time increasing thetonnage completed and furthermore obtaining a considerable sav ing inthe consumption of fuel.

In the drawings :.Figure 1 is a diagram matical View of an apparatuscapable of carrying the method into effect, and Fig. 2 is a like view ofan apparatus capable of carrying a modified form of method into effect.

Referring to Fig. 1 of the drawing 3 denotes a pair of tracks upon whichtravel trucks 4 for transporting the sheet bars, cut the requiredlength, to the pair furnace 5 in which the bars are heated. 6 denotes aroughing .mill which is adapted to operate upon the heated bars removedfrom the furnace'5 and the mill 6 is adapted to rough down and roll theheated bars to the required length so as to match up into packs innumbers'of two, three or four sheets to pack, depending upon the numberof sheets desired in the pack. The matcher removes the bars from theroughing mill 6 and matches'them up to size, then takes the matchedmaterial to the single furnace 7, two of which' ar'e shown and thematched material is reheated in the furnace 7 and after heated tothenecessary degree is taken to the finishing mill 8, and given one ortwo passes and returned to the matchers, it is then opened up anddoubled into a pack,-

and then hammered down by the steam hammer 9 and after being hammereditis transported to a furnace 10 for reheating. From the furnace 10, thereheated material, is taken to the finishing mill 8 and rolled to therequired length orgage. When carrying out the method, rough down barsfrom the roughing mill will be heated, after which they will besubjected to the finishing mills. In this connection it willbe statedthat some of the bars will be taken to one of the furnaces and thensubjecte to one finishing mill, and the bars next acted on by theroughing mill be taken to the other furnace, and then will go to theother finishing mill, and this alternate manner of heating the barsoperated on by the roughing mill will be carried on during the operationof the method, thus making a continuous operation, giving a more uniformheat and expansion to the rolls. The roughing mills and finishing millswill be provided with suitable water cooling devices and cold airblowers to control expansion of the rolls. In carrying out the method abreaking down mill 11 is employed and to which the material from thefurnace is subjected to, prior to the subjecting of the material to theroughing mill 6. In some instances the breaking down mill can bedispensed with.

In Fig. 2 of the drawings 12 denotes tracks upon which travel truoks13for transporting the bars to the pair furnace 14 and from the latter theheated material is taken to the breaking down mill 15-, then to theroughing mill 16 and from the roughing mill 16 after matching takento-the re-heating furnace 17 and from there to the finishing mill 18,then opened up" and'double-d over into a pack and hammered down by thehammer 19, then taken to the furnace 20 for re-,,heating and returned toa finishing mill for completion.

In the methods herein set forth, the rough-' ing mill will be inoperation at all times supplying sheets or packs for the finishing millson each side, .a1ternating each heat to one or the other mill. Theroughing mill will relieve the finishing mill of one quarter of itswork, getting that one quarter more in a finished sheet, or that onequarter mo" in tonnage of each finishing mill by utilizing the roughingmill to do a portion material, then removing the material from of thework of the finishing mill. "lVliat I claim is the front of thefinishing mill,- then dou-- bling and hammering down the drawn nial5 a Amethod oit manufacturing metal-11c iterlal, then heating the hammereddown and '5 sheets eonsistin'g in first heating cold sheet bars, thensubjecting the heated material to a roughing mill to roll the materialto the desired length, then removing the rolled material from the frontof the mill, then again 10 heating the material, then subjecting theheated material to a'finishing inill arranged at one side of theroughing mill to'draw said doubled 1naterial,.and then subjecting theheated material to the finishing mill.

In testimony whereof I aifix my signature in the presence of twoWitnesses.

ROBERT T. BANFIELD. Witnesses ll IAX H. SRoLovrrz, N. L. BOGAN.

